Aligned carbon tubes synthesized using porous aluminum oxide

Воробьева, А. И.; Shulitskii, B. G.

doi:10.1134/s1063739712030080

Cited by 2 publications

(1 citation statement)

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“…Another major challenge today is the development of reliable methods for the fabrication of nanomaterials and nanostructures. The most promising methods are template synthesis and the self-organization principles since they are inexpensive and straightforward [ 1 , 2 , 3 , 4 ]. The primary attention of researchers is focused on the electrochemical synthesis of nanostructures and nanowires (NW) based on them using porous materials as a template.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of the Densely Packed Ultra-Long Ni Nanowires Encapsulated in Alumina Membrane

et al. 2021

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High-quality and compact arrays of Ni nanowires with a high ratio (up to 700) were obtained by DC electrochemical deposition into porous anodic alumina membranes with a distance between pores equal to 105 nm. The nanowire arrays were examined using scanning electron microscopy, X-ray diffraction analysis and vibration magnetometry at 300 K and 4.2 K. Microscopic and X-ray diffraction results showed that Ni nanowires are homogeneous, with smooth walls and mostly single-crystalline materials with a 220-oriented growth direction. The magnetic properties of the samples (coercivity and squareness) depend more on the length of the nanowires and the packing factor (the volume fraction of the nanowires in the membrane). It is shown that the dipolar interaction changes the demagnetizing field during a reversal magnetization of the Ni nanowires, and the general effective field of magnetostatic uniaxial shape anisotropy. The effect of magnetostatic interaction between ultra-long nanowires (with an aspect ratio of >500) in samples with a packing factor of ≥37% leads to a reversal magnetization state, in which a “curling”-type model of nanowire behavior is realized.

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